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with import <stockholm/lib>;
{ config, pkgs, ... }: let
self = config.krebs.build.host.nets.wiregrill;
isRouter = !isNull self.via; # via "internet" is not set
ext-if = config.makefu.server.primary-itf;
in mkIf (hasAttr "wiregrill" config.krebs.build.host.nets) {
#hack for modprobe inside containers
systemd.services."wireguard-wiregrill".path = mkIf config.boot.isContainer (mkBefore [
(pkgs.writeDashBin "modprobe" ":")
]);
boot.kernel.sysctl = mkIf isRouter {
"net.ipv6.conf.all.forwarding" = 1;
"net.ipv4.conf.all.forwarding" = 1;
};
networking.nat = {
enable = true;
externalInterface = ext-if;
internalInterfaces = [ "wiregrill" ];
};
networking.firewall = {
allowedUDPPorts = [ self.wireguard.port ];
extraCommands = ''
${pkgs.iptables}/bin/iptables -A FORWARD -i wiregrill -o wiregrill -j ACCEPT
'';
};
networking.wireguard.interfaces.wiregrill = {
postSetup = ''
${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.220.245.0/24 -o ${ext-if} -j MASQUERADE
${pkgs.iptables}/bin/ip6tables -t nat -A POSTROUTING -s 42::/16 -o ${ext-if} -j MASQUERADE
'';
# This undoes the above command
postShutdown = ''
${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.244.245.0/24 -o ${ext-if} -j MASQUERADE
${pkgs.iptables}/bin/ip6tables -t nat -D POSTROUTING -s 42::/16 -o ${ext-if} -j MASQUERADE
'';
ips =
(optional (!isNull self.ip4) self.ip4.addr) ++
(optional (!isNull self.ip6) self.ip6.addr);
listenPort = self.wireguard.port;
privateKeyFile = (toString <secrets>) + "/wiregrill.key";
allowedIPsAsRoutes = true;
peers = mapAttrsToList
(_: host: {
allowedIPs = if isRouter then
(optional (!isNull host.nets.wiregrill.ip4) host.nets.wiregrill.ip4.addr) ++
(optional (!isNull host.nets.wiregrill.ip6) host.nets.wiregrill.ip6.addr)
else
host.nets.wiregrill.wireguard.subnets
;
endpoint = mkIf (!isNull host.nets.wiregrill.via) (host.nets.wiregrill.via.ip4.addr + ":${toString host.nets.wiregrill.wireguard.port}");
persistentKeepalive = mkIf (!isNull host.nets.wiregrill.via) 61;
publicKey = (replaceStrings ["\n"] [""] host.nets.wiregrill.wireguard.pubkey);
})
(filterAttrs (_: h: hasAttr "wiregrill" h.nets) config.krebs.hosts);
};
}
|
